Harrison still has two years remaining on his contract at the Raiders but the 27-year-old has been on the outer at Canberra, the Raiders attempting to move him on to another club since the middle of the year.

It now appears the Dragons will be his destination, and he could be there as early as today.

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The Dragons have already lost back-rowers Beau Scott (Newcastle), Dean Young (retirement) and Jeremy Latimore (Penrith) in the off-season. Miller's impending retirement opens further space for Harrison.

After captaining the Raiders at one stage in 2011, Harrison has spoken publicly about 2012 being the most frustrating season of his NRL career.

Injuries restricted Harrison to just 10 games last season as Shaun Fensom, Josh Papalii and Joel Thompson entrenched themselves in the Canberra back row.

The Raiders have also boosted their back-row stocks in the off-season, adding Joel Edwards (Knights) and Jake Foster (Bulldogs).

Meanwhile, coach David Furner is yet to finalise his support coaching structure.

Canberra's new strength and conditioning coach Nigel Ashley-Jones will begin work today, having arrived from the UK on Wednesday.

Ashley-Jones, an Australian, has worked in the northern hemisphere since 1996 in rugby league, rugby union and soccer. He was recruited to the Raiders because of a previous association with Furner at English powerhouse club Wigan.

Furner is still to settle on the rest of his coaching structure, following the sacking of assistant Justin Morgan and the resignation of fellow assistant Andrew McFadden.

Raiders under-20s coach Andrew Dunemann has been promoted to an NRL assistant role, but it's understood Furner is deciding whether to appoint another assistant.

Furner has previously discussed the options of bringing in a full-time sports scientist and a high-performance manager. The Raiders are also looking at a full-time statistical analyst to keep pace with the advances of the NRL's top clubs such as Manly and Melbourne.